envoy/src/main/resources/fxml/ChatScene.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.ListView?>
<?import javafx.scene.control.TextArea?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.RowConstraints?>

<GridPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="400.0" minWidth="350.0" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="envoy.client.ui.ChatSceneController">
	<columnConstraints>
		<ColumnConstraints hgrow="SOMETIMES" maxWidth="1.7976931348623157E308" minWidth="10.0" percentWidth="20.0" prefWidth="161.0" />
		<ColumnConstraints hgrow="SOMETIMES" maxWidth="1.7976931348623157E308" minWidth="10.0" percentWidth="65.0" prefWidth="357.0" />
      <ColumnConstraints hgrow="SOMETIMES" maxWidth="1.7976931348623157E308" minWidth="6.285736083984375" percentWidth="15.0" prefWidth="48.000030517578125" />
	</columnConstraints>
	<rowConstraints>
		<RowConstraints maxHeight="1.7976931348623157E308" minHeight="10.0" percentHeight="10.0" prefHeight="70.0" vgrow="SOMETIMES" />
		<RowConstraints maxHeight="1.7976931348623157E308" minHeight="10.0" percentHeight="60.0" prefHeight="326.2857404436384" vgrow="SOMETIMES" />
      <RowConstraints maxHeight="1.7976931348623157E308" minHeight="10.0" percentHeight="15.0" prefHeight="50.0" vgrow="SOMETIMES" />
		<RowConstraints maxHeight="1.7976931348623157E308" minHeight="10.0" percentHeight="15.0" prefHeight="100.0" vgrow="SOMETIMES" />
	</rowConstraints>
	<children>
		<ListView fx:id="userList" onMouseClicked="#userListClicked" prefHeight="211.0" prefWidth="300.0" GridPane.rowIndex="1" GridPane.rowSpan="2147483647" />
		<Label fx:id="contactLabel" prefHeight="16.0" prefWidth="250.0" text="Select a contact to chat with" GridPane.columnSpan="2" />
		<Button fx:id="settingsButton" mnemonicParsing="false" onAction="#settingsButtonClicked" text="Settings" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.valignment="CENTER"/>
		<ListView fx:id="messageList" prefHeight="257.0" prefWidth="155.0" GridPane.columnIndex="1" GridPane.columnSpan="2" GridPane.rowIndex="1" GridPane.rowSpan="2" />
		<Button fx:id="postButton" defaultButton="true" disable="true" mnemonicParsing="false" onAction="#postButtonClicked" prefHeight="10.0" prefWidth="65.0" text="Post" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.rowIndex="3" GridPane.valignment="CENTER" />
      	<TextArea fx:id="messageTextArea" onKeyReleased="#messageTextUpdated" onInputMethodTextChanged="#messageTextUpdated" prefHeight="200.0" prefWidth="200.0" wrapText="true" GridPane.columnIndex="1" GridPane.rowIndex="3" />
      <Button mnemonicParsing="false" text="Add Contacts" GridPane.halignment="CENTER" GridPane.rowIndex="3" GridPane.valignment="CENTER">
         <padding>
            <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
         </padding>
      </Button>
	</children>
</GridPane>